• 1 springboot2配置拦截器和Springboot配置有所不同，话不多说，showcode。

import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.config.annotation.InterceptorRegistration;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

@Configuration
public class WebConfig implements WebMvcConfigurer {
    @Override
    public void addInterceptors(InterceptorRegistry registry) {

        InterceptorRegistration interceptorRegistration = registry.addInterceptor(new SessionHandlerInterceptor());
        interceptorRegistration.excludePathPatterns("/error");
        interceptorRegistration.excludePathPatterns("/static/**");
        interceptorRegistration.excludePathPatterns("/login");

        interceptorRegistration.addPathPatterns("/**");


    }


    private class SessionHandlerInterceptor implements HandlerInterceptor {
        @Override
        public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) {

            Object user = request.getSession().getAttribute("user");
            if (user == null) {
                try {
                    response.sendRedirect("/login");
                } catch (IOException e) {
                    e.printStackTrace();
                }
                return false;

            }
            return true;
        }

        @Override
        public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) {
            //controller方法处理完毕后，调用此方法
        }

        @Override
        public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) {
            //页面渲染完毕后调用此方法
        }
    }
}

• 2 重点在于

 interceptorRegistration.excludePathPatterns("/static/**");

这句会忽略静态资源。